const encrypt = require('./crypto')
const request = require('request')
const fs = require('fs')
const queryString = require('querystring')
const PacProxyAgent = require('pac-proxy-agent')

// request.debug = true // 开启可看到更详细信息

const chooseUserAgent = ua => {
    const userAgentList = [
        'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
        'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
        'Mozilla/5.0 (Linux; Android 5.0; SM-G900P Build/LRX21T) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Mobile Safari/537.36',
        'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Mobile Safari/537.36',
        'Mozilla/5.0 (Linux; Android 5.1.1; Nexus 6 Build/LYZ28E) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Mobile Safari/537.36',
        'Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_2 like Mac OS X) AppleWebKit/603.2.4 (KHTML, like Gecko) Mobile/14F89;GameHelper',
        'Mozilla/5.0 (iPhone; CPU iPhone OS 10_0 like Mac OS X) AppleWebKit/602.1.38 (KHTML, like Gecko) Version/10.0 Mobile/14A300 Safari/602.1',
        'Mozilla/5.0 (iPad; CPU OS 10_0 like Mac OS X) AppleWebKit/602.1.38 (KHTML, like Gecko) Version/10.0 Mobile/14A300 Safari/602.1',
        'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:46.0) Gecko/20100101 Firefox/46.0',
        'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36',
        'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/603.2.4 (KHTML, like Gecko) Version/10.1.1 Safari/603.2.4',
        'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:46.0) Gecko/20100101 Firefox/46.0',
        'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36',
        'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/13.10586'
    ]
    let index = 0
    if (typeof ua == 'undefined')
        index = Math.floor(Math.random() * userAgentList.length)
    else if (ua == 'mobile') index = Math.floor(Math.random() * 7)
    else if (ua == 'pc') index = Math.floor(Math.random() * 5) + 8
    else return ua
    return userAgentList[index]
}

const createRequest = (method, url, data, options) => {
    return new Promise((resolve, reject) => {
        let headers = { 'User-Agent': chooseUserAgent(options.ua) }
        if (method.toUpperCase() == 'POST')
            headers['Content-Type'] = 'application/x-www-form-urlencoded'
        if (url.includes('music.163.com'))
            headers['Referer'] = 'https://music.163.com'
        // headers['X-Real-IP'] = '118.88.88.88'

        if (typeof options.cookie === 'object')
            headers['Cookie'] = Object.keys(options.cookie)
                .map(
                    key =>
                        encodeURIComponent(key) +
                        '=' +
                        encodeURIComponent(options.cookie[key])
                )
                .join('; ')
        else if (options.cookie) headers['Cookie'] = options.cookie

        if (options.crypto == 'weapi') {
            let csrfToken = (headers['Cookie'] || '').match(/_csrf=([^(;|$)]+)/)
            data.csrf_token = csrfToken ? csrfToken[1] : ''
            fs.writeFileSync('11.json',JSON.stringify(data))
            data = encrypt.weapi(data)
            url = url.replace(/\w*api/, 'weapi')
        } else if (options.crypto == 'linuxapi') {
            data = encrypt.linuxapi({
                method: method,
                url: url.replace(/\w*api/, 'api'),
                params: data
            })
            headers['User-Agent'] =
                'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.90 Safari/537.36'
            url = 'https://music.163.com/api/linux/forward'
        }

        const answer = { status: 500, body: {}, cookie: [] }
        const settings = {
            method: method,
            url: url,
            headers: headers,
            body: queryString.stringify(data)
        }

        if (/\.pac$/i.test(options.proxy)) {
            settings.agent = new PacProxyAgent(options.proxy)
        } else {
            settings.proxy = options.proxy
        }
        request(
            settings,
            (err, res, body) => {
                if (err) {
                    answer.status = 502
                    answer.body = { code: 502, msg: err.stack }
                    reject(answer)
                } else {
                    answer.cookie = (res.headers['set-cookie'] || []).map(x =>
                        x.replace(/\s*Domain=[^(;|$)]+;*/, '')
                        // x
                    )
                    try {
                        answer.body = JSON.parse(body)
                        answer.status = answer.body.code || res.statusCode
                    } catch (e) {
                        answer.body = body
                        answer.status = res.statusCode
                    }
                    answer.status =
                        100 < answer.status && answer.status < 600 ? answer.status : 400
                    if (answer.status == 200) resolve(answer)
                    else reject(answer)
                }
            }
        )
    })
}

module.exports = createRequest
